The Audio Research GSpre

"Audio Research GSPre" Stereo Vacuum Tube Line and Phono Preamplifier with Headphone Amplifier

• This preamplifier retails new at $15,000.
• The GSPre is both a line stage and phono stage, with programmable functionality and flexibility, making it the perfect solution to adapt and grow in your system.
• The phono stage is no mere afterthought - but a separate, vacuum tube-powered circuit providing enough gain for a variety of phono cartridges.
• The GSPre includes a headphone amplifier capable of driving a range of headphone impedances.
• The front panel layout is designed to simply and clearly display all functions and information.
• 3 - single-ended inputs.
• 2 - pairs of balanced inputs, BAL1 and BAL2 (XLR).
• 1 - pairs of single-ended (RCA output).
• 1 - pair of balanced (XLR) outputs, Main 1 and Main 2, to connect the GSPre to a power amp.
• This GSPre is equipped with all steel/remote...not the plastic version.
• Original double box for shipping.
• Original manual.
• The GSPre measures 19W” x 7.75”H x 17.25”D and weighs 25 pounds.
• This particular piece was purchased from the largest authorized dealer of Audio Research located here in Southern California.
• The tube set is original with 2584 hours... just breaking in (5k+ hours rated tube life).

SPECS
• Pure Class-A differential amplifiers in the Line stages, no feedback.

• Pure Class-A SE amplifiers in the Phono stages, no feedback.

• VF display with Blue LED’s for Phono Loads and mode selected, and rotating Volume & Input Select encoder.

• Hand held IR Remote and RS-232 and remote IR inputs for whole home audio system.

• Balance and SE input/output.

• 7 levels of voltage regulation and a low noise R-core power transformer.

• Phono stage features low noise JFET inputs and 6H30 outputs as well as programmable loading.

• Line stage features low noise JFET inputs and 2 parallel 6H30 outputs.

• Features custom designed coupling capacitors in the line and phono stages.

• +12v trigger output to turn on power amplifier and other system components.

• Low distortion vacuum tube headphone amplifier designed for driving a wide impedance range, 30-300 ohms.

• Removable 15A IEC power cord.